Another investigation: “Law enforcement officials became so concerned by President Donald Trump's behavior in the days after he fired FBI Director James Comey that they began investigating whether he had been working for Russia against U.S. interests, The New York Times reported Friday.”
And when the FBI passes a stringent litmus test to investigate a public sensitive person (President), then they have much more like intel, phone conversations and the like.
trump’s position has been nudged toward “treason.”